From patchwork Thu Aug 3 18:33:22 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Mark Brown X-Patchwork-Id: 13340749 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id A085FEB64DD for ; Thu, 3 Aug 2023 18:43:32 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:Cc:To:In-Reply-To:References:Message-Id :MIME-Version:Subject:Date:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=3RMSNJcwWRihmTdnkQ+DFhE9yv+0boffZK3JYuOyFMU=; b=D4K2BSdmnrepWZ l6urEjuAZecK0er6hqbl+G8PTPMHHVApU6RGw93pO98bKDWjXTR6rN5l1n5BGf2jg+Q+w0JPZNEc5 4C4zIE2TWjhJDvusDZavtMODs8pp8tfE7xfe22ste/b3ggtVwcHjsVZBgd1g66huM+zSgcqnDdkVg 73rU/augK24IGJzZSz4ReJXpLebrkkhev/QIwGTO364K1yLaPZnyJUaGhh6Y+BIvWKugJTW1d6js1 hdS/QboalYikW8MkZBrjI0PQrdzn8L6SIR8nwIUfpNR53zfUKj5XmkxsmAu/JJ+b43VofQaaHL9sV /SdO3tfqIdp45mcOhPSQ==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.96 #2 (Red Hat Linux)) id 1qRdHt-00AeHE-1Z; Thu, 03 Aug 2023 18:43:05 +0000 Received: from dfw.source.kernel.org ([2604:1380:4641:c500::1]) by bombadil.infradead.org with esmtps (Exim 4.96 #2 (Red Hat Linux)) id 1qRdHD-00AdTU-0z for linux-arm-kernel@lists.infradead.org; Thu, 03 Aug 2023 18:42:24 +0000 Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id 6F69261E98; Thu, 3 Aug 2023 18:42:22 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 2D58CC433CB; Thu, 3 Aug 2023 18:42:19 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1691088141; bh=VyfjNO5h5r77yO4Y1JW8iCxzkIDFIM1fWR/4Pr5RYRg=; h=From:Date:Subject:References:In-Reply-To:To:Cc:From; b=PLCPxIk+rX4tVb1dQWIa7fuSns+Q05eQxvWW1pX9z4siJovRzdIkePyyZFfLatKwg OKjhAo4UeTFFBQl8ZqVXb+hivg4QBExi/Q1qkURhjOL8a9ElJiC1ouwgShjA1i2Fxf jmf/cvlP09V+cY6Jg0DdTJNPRW4GzRP7HwTgv5Cu8KKgRSDsPyEXnDRBwG5z86vwIs bg/NJCZ3hLg4KHoHshygIiVaCbkv2V2pkUBoTSkhzQ9rB+tTywray8lkcpbD2DaiEe X/LApfLG0zs7LmR2cjVTaQ6eu4oo0mRRWWLy/GIL2U1HZ/dTfw9FvKZq9OCLa7kONq aJmqThvOXaYcg== From: Mark Brown Date: Thu, 03 Aug 2023 19:33:22 +0100 Subject: [PATCH 2/3] arm64/fpsimd: Sync FPSIMD state with SVE for SME only systems MIME-Version: 1.0 Message-Id: <20230803-arm64-fix-ptrace-ssve-no-sve-v1-2-49df214bfb3e@kernel.org> References: <20230803-arm64-fix-ptrace-ssve-no-sve-v1-0-49df214bfb3e@kernel.org> In-Reply-To: <20230803-arm64-fix-ptrace-ssve-no-sve-v1-0-49df214bfb3e@kernel.org> To: Oleg Nesterov , Catalin Marinas , Will Deacon Cc: David Spickett , linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, Mark Brown , stable@vger.kernel.org X-Mailer: b4 0.13-dev-034f2 X-Developer-Signature: v=1; a=openpgp-sha256; l=1318; i=broonie@kernel.org; h=from:subject:message-id; bh=VyfjNO5h5r77yO4Y1JW8iCxzkIDFIM1fWR/4Pr5RYRg=; b=owEBbQGS/pANAwAKASTWi3JdVIfQAcsmYgBky/UFuHsJ06H3Tw69T76dXRohdyF0xpCyyRI8oCC/ d5fJ7SeJATMEAAEKAB0WIQSt5miqZ1cYtZ/in+ok1otyXVSH0AUCZMv1BQAKCRAk1otyXVSH0DwkB/ wLdg/UyqGcamMN1NStA3gnuq4KUFkBMnOgGe0MR/DTXqKb4z5c4AXSdU+WQZ8iFVP1nNFtpPERUinw 4ePvcXEwRCtiLVET0UOMyq8C06RslgakCPJJ6OgSXVXA18uKXsNjZVnLorkwhvNay5Xwxi39v1OX/k RhczmRj2zdB9EACANJtldzSkwNjt82ambXoCiQKkUKIXl/AHUOnlNc47v95rO5+Orn+spJUQW6adk9 SjKPRalND+QtLZvjmssYZWZZ95FxdBoVPz1iIosAzsfSRp63NMTXCypaergImIVq+q/079uw4cWLC+ d5oJfnBr7baCUCEDWA7aOHdSUOJrIK X-Developer-Key: i=broonie@kernel.org; a=openpgp; fpr=3F2568AAC26998F9E813A1C5C3F436CA30F5D8EB X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20230803_114223_469794_EEF09BCB X-CRM114-Status: GOOD ( 14.54 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Currently we guard FPSIMD/SVE state conversions with a check for the system supporting SVE but SME only systems may need to sync streaming mode SVE state so add a check for SME support too. These functions are only used by the ptrace code. Fixes: e12310a0d30 ("arm64/sme: Implement ptrace support for streaming mode SVE registers") Signed-off-by: Mark Brown Cc: stable@vger.kernel.org --- arch/arm64/kernel/fpsimd.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/arch/arm64/kernel/fpsimd.c b/arch/arm64/kernel/fpsimd.c index 520b681a07bb..b4afa0d147cc 100644 --- a/arch/arm64/kernel/fpsimd.c +++ b/arch/arm64/kernel/fpsimd.c @@ -679,7 +679,7 @@ static void fpsimd_to_sve(struct task_struct *task) void *sst = task->thread.sve_state; struct user_fpsimd_state const *fst = &task->thread.uw.fpsimd_state; - if (!system_supports_sve()) + if (!system_supports_sve() && !system_supports_sme()) return; vq = sve_vq_from_vl(thread_get_cur_vl(&task->thread)); @@ -705,7 +705,7 @@ static void sve_to_fpsimd(struct task_struct *task) unsigned int i; __uint128_t const *p; - if (!system_supports_sve()) + if (!system_supports_sve() && !system_supports_sme()) return; vl = thread_get_cur_vl(&task->thread);